. >> when i met him in 2009, he was -- >> he was a gifted boxer, and he and julian pollard became friends. >> flashy guy, confident guy, and the guy was humbled and talked to me about his faith. >> the fbi was told in 2011 by the russian government that tamerlan was a follower of radical islam and a strong believer who was planning to travel to russia and join unspecified underground groups, the fbi opened up a case file on tamerlan. >> they looked into u.s. internal terrorism databases and found nothing. and they looked at whether he was in touch with suspected terrorists that were in the databases, and found nothing. and then they decided to interview him and members of his family in cambridge. and came away thinking we got nothing on this guy. so the fbi says they went back to the russians and said we're coming up empty, what more do you have? and they said the russians never responded. so in essence, the case was closed. >> in 2012, tamerlan traveled to the russian republic of dagestan for six months, investigators are scrutinizing tamerlan's time abroad to see if he linked up with an